clang -O3 -mllvm -disable-llvm-optzns -c -emit-llvm a.c -o a.bc
opt -passes=correlated-propagation,dce,flattencfg a.bc -o a.opt.bc
clang a.opt.bc -o a.out
 ./a.out
Floating point exception (core dumped)

int a;
void b() {
  int c;
  unsigned int d = 6;
  c = 3 % (((a || 0) < 0) - d || 0);
}
int main() { b(); }